bitterroot vs wildflower

bitterroot and wildflower both are nouns.

Word	Noun	Adjective	Verb	Adverb
bitterroot	Yes	No	No	No
wildflower	Yes	No	No	No

As nouns, wildflower is a hypernym of bitterroot; that is, wildflower is a word with a broader meaning than bitterroot:

bitterroot: showy succulent ground-hugging plant of Rocky Mountains regions having deep to pale pink flowers and fleshy farinaceous roots; the Montana state flower
wildflower: wild or uncultivated flowering plant

Other hypernyms of bitterroot include wild flower.

bitterroot (noun)	wildflower (noun)
showy succulent ground-hugging plant of Rocky Mountains regions having deep to pale pink flowers and fleshy farinaceous roots; the Montana state flower	wild or uncultivated flowering plant